A nano-refractive index sensor based on a MIM waveguide with a semicircular ring rectangular resonator

被引：6
|
作者：
Chen, Jia-Hua [1 ]
Wang, Liu [1 ]
Feng, Yu-Ting [1 ]
Chen, Jun-Xue [1 ]
Zeng, Ya-Ping [1 ]
机构：
[1] Guilin Univ Technol, Coll Sci, Educ Dept Guangxi Zhuang Autonomous Reg, Key Lab Lowdimens Struct Phys & Applicat, Guilin 541004, Peoples R China
来源：
MICRO AND NANOSTRUCTURES | 2024年 / 186卷
基金：
中国国家自然科学基金;
关键词：
Surface plasmons; MIM waveguide; High sensitivity; Sensor; INDUCED TRANSPARENCY; FANO RESONANCE;
D O I：
10.1016/j.micrna.2023.207730
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
This paper proposes a novel nano-sensor structure consisting of the metal-insulator-metal (MIM) waveguide with two rectangular baffles and a semicircular ring rectangular resonator (SRRR). The sensor's transmission characteristics are investigated using the finite-difference time-domain (FDTD) method. The results show that the transmission spectrum of the sensor exhibits the Fano resonance shape. The influences of refractive index and structural parameters on transmission characteristics are systematically investigated. The maximum sensitivity (S) of the sensor can get up to 2560 nm/RIU (refractive index unit), and the figure of merit (FOM) is 1080. In addition, the potential application of the structure in temperature sensing is explored with a sensitivity of 0.87 nm/degrees C. The proposed structure has promising applications in nanoscale optical sensing.
引用
收藏
页数：8
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